Abstract
Software ISEH (Integrated system of road projects economic evaluation) evaluates variants of road repair and maintenance technologies. The economic assessment is based on Cost Benefit Analysis indicators (net present value, internal rate of return, pay-back period and cost benefit ratio). According quantified indicators are determined order of repairs and maintenance of assessed road sections. The road works cause additional negative impacts to road users. The road repairs and maintenance create on road so-called work zones, which negative affect road users. One of the negative impacts is travel time loss of road users. The process of quantification and valuation of travel time costs due to road works, i.e. work zones create a base for implementation to the ISEH software. For implementation it was necessary to suggest changes in current algorithm of the Software - Integrated system of road projects economic evaluation. The aim of the implementation is effective planning road repairs and maintenance not only in terms of choice effective technology but also in terms of reducing negative impacts to road users. A practical example of calculating travel time costs due to work zone has been processed in Excel software.